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$118+ Cheap flights from St. Louis (STL) to Mexico

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MEX
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap flight deals from St. Louis to Mexico

Keep the following information in mind while searching for St. Louis to Mexico flight deals. Data was last updated junio 12, 2025.

Round-trip from

$290
(Mytrip)

One-way from

$118
(FlightHub)

Popular in

December

Cheapest in

August

Average price

$652

Good round-trip deal

$300 or less

Good one-way deal

$229 or less
From Lambert-St Louis to Mexico
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One-way flight from Lambert-St Louis to Mexico
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Highest demand for flights based on searches. 5% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Mexico.
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Price to beat on a one-way flight from Lambert-St Louis to Mexico.
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Find flight deals from St. Louis to Mexico

Cheapest flights from St. Louis to Mexico
Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/66:36 pmSTL - CUN
1 stop14h 19mSpirit Airlines
jue. 7/109:50 amCUN - STL
1 stop24h 02mSpirit Airlines
Deal found 6/11$290
This Priceline deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/66:36 pmSTL - CUN
1 stop14h 19mMultiple Airlines
jue. 7/1012:37 pmCUN - STL
Nonstop3h 17mMultiple Airlines
Deal found 6/11$338
This CheapOair deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/303:02 pmSTL - CUN
1 stop21h 22mFrontier
sáb. 9/131:41 pmCUN - STL
1 stop20h 26mFrontier
Deal found 6/11$374
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/316:40 amSTL - CUN
1 stop6h 05mDelta
mar. 9/306:02 amCUN - STL
2 stops12h 00mDelta
Deal found 6/12$393
This Booking.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/167:30 amSTL - MEX
1 stop16h 45mAir Canada
lun. 6/237:10 amMEX - STL
1 stop11h 48mAir Canada
Deal found 6/10$421
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/166:30 amSTL - PVR
2 stops11h 48mDelta
vie. 9/1910:49 amPVR - STL
2 stops11h 50mDelta
Deal found 6/11$433
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/187:01 amSTL - CUN
1 stop6h 48mAmerican Airlines
dom. 8/2410:45 amCUN - STL
1 stop13h 14mAmerican Airlines
Deal found 6/10$438
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/227:20 amSTL - SJD
2 stops12h 41mDelta
vie. 9/261:56 pmSJD - STL
1 stop8h 41mDelta
Deal found 6/10$439
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/317:01 amSTL - SJD
1 stop6h 36mAmerican Airlines
vie. 9/511:40 amSJD - STL
2 stops9h 10mAmerican Airlines
Deal found 6/11$443
This Aeromexico deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/86:00 amSTL - CUN
1 stop5h 25mAeromexico
jue. 7/1712:40 pmCUN - STL
1 stop7h 56mAeromexico
Deal found 6/10$468
This FlightHub deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/3010:17 amSTL - MEX
1 stop13h 43mFrontier
mié. 11/55:45 pmMEX - STL
1 stop24h 22mFrontier
Deal found 6/12$471
This CheapOair deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/277:54 pmSTL - MEX
1 stop22h 36mMultiple Airlines
dom. 8/316:45 amMEX - STL
1 stop10h 24mMultiple Airlines
Deal found 6/9$480

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Mexico that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
Use the filters below to find and compare flights from St. Louis to Mexico that are best for you.

Fly from

St. Louis

Fly to

Mexico

Route

Depart

Return

Price

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

dom. 7/6

6:36 pm-8:55 am

1 stop14h 19m

Cancun

jue. 7/10

9:50 am-9:52 am

1 stop24h 02m

$290

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

dom. 7/6

6:36 pm-8:55 am

1 stop14h 19m

Cancun

jue. 7/10

12:37 pm-3:54 pm

Nonstop3h 17m

$338

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

sáb. 8/30

3:02 pm-12:24 pm

1 stop21h 22m

Cancun

sáb. 9/13

1:41 pm-10:07 am

1 stop20h 26m

$374

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

dom. 8/31

6:40 am-12:45 pm

1 stop6h 05m

Cancun

mar. 9/30

6:02 am-6:02 pm

2 stops12h 00m

$393

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

dom. 6/22

7:30 am-11:10 am

1 stop28h 40m

Mexico City Benito Juarez

sáb. 6/28

7:10 am-8:48 pm

1 stop12h 38m

$429

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

lun. 8/18

7:01 am-1:49 pm

1 stop6h 48m

Cancun

dom. 8/24

10:45 am-11:59 pm

1 stop13h 14m

$438

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

lun. 9/22

7:20 am-6:01 pm

2 stops12h 41m

San José del Cabo Los Cabos

vie. 9/26

1:56 pm-12:37 am

1 stop8h 41m

$439

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

dom. 8/31

7:01 am-11:37 am

1 stop6h 36m

San José del Cabo Los Cabos

vie. 9/5

11:40 am-10:50 pm

2 stops9h 10m

$443

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

mar. 6/17

7:30 am-7:40 pm

1 stop12h 10m

Cancun

jue. 6/19

2:00 pm-8:48 pm

1 stop30h 48m

$467

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

mar. 7/8

6:00 am-11:25 am

1 stop5h 25m

Cancun

jue. 7/17

12:40 pm-8:36 pm

1 stop7h 56m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis to Mexico

Have a flexible travel schedule? Discover the best time to fly to Mexico from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Mexico

What is the cheapest month to book a flight from St. Louis to Mexico?

Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $388). Flying from St. Louis to Mexico in December is currently the most expensive (average of $615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MX?

Find hourly flight availability from St. Louis to Mexico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

When flying from St. Louis to Mexico, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Mexico by month

Plan your trip to Mexico by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Mexico ranges from 0.0 - 4.7 inches per month. July is typically the wettest month, when rainfall can reach 4.7 in. January is typically the driest time to visit Mexico when rainfall is around 0.0 in.

Temperature in Mexico by month

Plan your trip to Mexico by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Mexico, use this chart to help with planning. For those seeking warmer temperatures, May is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 55.4 F).

Reviews of airlines servicing Mexico

Get insights into the airlines that provide service to Mexico. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Mexico. Reviews last updated junio 12, 2025.
Read reviews from past customers who have flown Delta, Alaska Airlines and Southwest from St. Louis to Mexico. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Southwest
8.0
Very good
4,287 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Hawaiian Airlines
7.9
Good
2,494 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Aeromexico
7.5
Good
1,706 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Mexico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Mexico?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Mexico.

  • What are the cheapest airlines to fly from St. Louis to Mexico one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $118. Users have also found prices from $167 and $182 on Frontier and Delta, respectively.

  • What are the most popular routes from St. Louis to Mexico?

    The most popular route from St. Louis to Mexico is Lambert-St Louis - Cancun. You may also consider Lambert-St Louis - Cozumel or Lambert-St Louis - San José del Cabo Los Cabos.

  • Can I find deals for flights from St. Louis to Mexico that include hotel bookings?

    Yes. In addition to deals on St. Louis to Mexico flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Mexico?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Mexico.

  • Can I find deals for business class flights from St. Louis to Mexico?

    Yes. Cheapflights offers flight deals from St. Louis to Mexico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Mexico?

    Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $388). Flying from St. Louis to Mexico in December is currently the most expensive (average of $615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to Mexico

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from St. Louis to Mexico

Discover the top 9 airlines that operate flights from St. Louis to Mexico. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$130Average$293FlexibilityNo cancel feeOn-time65%
VolarisCheapest$175Average$373FlexibilityNo cancel feeOn-time79%
FrontierCheapest$290Average$548FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$306Average$576FlexibilityNo cancel feeOn-time71%
AeromexicoCheapest$346Average$516FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$358Average$572FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$398Average$528FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$411Average$635FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$482Average$712FlexibilityNo cancel feeOn-time63%

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